避免多次点击处理程序 [英] Avoid Multiple Click Handlers

问题描述

我有几个模拟键盘的按钮...好吧..每次单击一个键时，程序都必须重定向到其键的页面，好吗?...有比此键更好的方法吗?在每个click()事件上?

I have several buttons emulating a keyboard...well..everytime you click on a key, the program must redirect to the page of its key, ok?...Is there a better way of doing this than putting this on every click() event?

private void btnA_Click(object sender, EventArgs e)
        {
            ObtenerResultados(((Button) sender).Text);
        }

private void btnB_Click(object sender, EventArgs e)
        {
            ObtenerResultados(((Button) sender).Text);
            Application.DoEvents();
        }

是否对所有按钮都调用相同的按钮...也许有更快的方法?

谢谢

Is the same call for all buttons...maybe there is a faster way?

Thanks

推荐答案

我并没有真正关注您，但是您的按钮可以共享相同的点击处理程序(您只需要一个"btn_Click"，而不是"btnA_Click"，"btnB_Click"等).我不确定您使用的是ASP.Net还是Windows Forms(或WPF)，因此我并不是很想为您提供可能会使您感到困惑的示例代码.基本上，请转到分配了单击处理程序的位置，然后选择其他选项.

I don''t really follow you, but your buttons can all share the same click handler (you only need a single "btn_Click" rather than a "btnA_Click", "btnB_Click", and so on). I''m not sure if you''re using ASP.Net or Windows Forms (or WPF), so I don''t really want to provide you with sample code that might confuse you. Basically, go to where the click handler is assigned and choose a different one.

为什么要从事件处理程序中调用DoEvents?

只需创建一个按钮单击处理程序，然后做您已经在做的事情:

Why are you calling DoEvents from an event handler?

Just create one button click handler and do what you''re already doing:

private void btnLetters_Click(object sender, EventArgs e)        
{
    ObtenerResultados(((Button) sender).Text);        
}

然后将该事件附加到所有适用的按钮上.

And then attach that event to all of the applicable buttons.

好吧，更确切地说，您需要一个代表键盘的所有按钮的处理程序，但是您仍然需要有关确切按下按键的信息.另外，您还需要使用更好的语法-自动生成的语法已过时(您对v.4.0感​​兴趣，是吗?)，并且相对于lambda语法而言相对较低.

该代码将是这样的:

Ok, more exactly, you need one handler for all buttons representing a keyboard, but you still need information on what exactly key was pressed. Also, you need to use better syntax -- the auto-generated syntax is gravely obsolete (you''re interested in v.4.0, huh?) and inferior relative the lambda syntax.

The code will be something like this:

for (Button button in KeyboardButtons)
   //in the following line, you're sure sender can be cast to Button:
   button.Click += (sender, args) => { ClickHandler((Button)sender); };

//...

//you don't have to use args parameter:
void ClickHandler(Button sender) {
    string text = sender.Text; //in WPF it would be (string)sender.Content
    Debug.Assert(text.Length > 0);
    char key = text[1];
   //now you know which key is represented by the button pressed
   //...
} //ClickHandler

..//

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